tourism culturalism. talk about this heritage trail. the idea was to get people off the mall? >> that's how we started out. we thought tourists come to d.c. every year and go to the mall and don't see the rest of the beautiful city. we started heritage trails to give them a way to get off the mall, have a self-guided experience, and learn something about us. but what we discovered over time very quickly is that this is about building community pride and bringing communities together over their shared history. >> reporter: and these trails reflect the community's identity of itself don't they? >> absolutely. you know, our trails are unique in the country. i'm a historian and i don't come in and say, okay. you're going to have a heritage trail because you have a really interesting neighborhood. the community comes to me. and we spend the first year of work on these trails talking to folks in the community, people who live here now, people who lived here before, getting their stories and adding to it, the history we research. >> reporter: excellent. there are lots of key points here and of course a lot of local connections. even the channel 4. i want to show you a picture here.